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3PE Steel Pipe

 
Why choose GNEE coated steel pipe?

Rich Experience

Gnee Steel Group was founded in 2008, has 18 years of experience in steel manufacturing.

Wide Product Range

The company's main products include: stainless steel pipes, API steel pipes, coated steel pipes, carbon steel pipes, alloy boiler pipes, etc.

Broad Market

The company's products are exported to more than 160 countries around the world, with a total of more than 800 global cooperative enterprises, including 15 shipbuilding companies, 143 engineering project companies, and 23 boiler machinery manufacturers.

Quality Guaranteed

Gnee has a strict procurement and quality inspection team carefully selects high-quality raw materials; an advanced science and technology team improves production and reduces costs for customers.

 

 

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GNEE coated steel pipe specifications
 

 

Pipe Type:PE Coated Pipe, 2PE Coated Pipe, 3PE Coated Pipe
Application:Used for for natural gas, petroleum, water & sewage, and pipe systems
Specification:OD: 219mm~2020mm
WT: 5mm~25mm
LENGTH: 4mtr, 6mtr, 12mtr, 18mtr, 21mtr
Coating Standard:DIN 30670, DIN 30671, DIN 30678, SY/T0413-2002 etc.
Pipe Type: Submerged Arc Welded (LSAW/SSAW), Electrci Resistance Welded
Ends:Plain,Beveled, Thread With Couplings Or Sockets; Plastic Caps And Steel Rings Can Be Provided if possible
Surface:Two Layer Polyethylene Coating (2mm~4.5mm)
Packing:Waterproof Paper wrapped, Steel Strips bundled, two tags on each bundle

3PE Steel Pipe

3PE anti-corrosion pipe three-tier structure:
the first layer of epoxy powder (FBE> 100um), the second adhesive (AD) 170-250um, the third layer of polyethylene (PE) 2.5-3.7mm.
Three of the integration, and steel pipe with a good solid coating. Diameter of Φ159-Φ1220.

3PE Coating Steel Pipe/2PE Coating Steel Pipe:
-Coating Material: Epoxy Powder, Adhesion, Polyethylene Or Polypropylene, Cement Inside
-Standard: API 5L (PSL1, PSL2); GB/T 9711.1;
-Grade: Gr. B, X42, X46, X52, X60, X65, X70, X80;
-The third party, SGS, BV, can be accepted.

 

Minimum total layer thickness range

M kg/m

Layer thickness in mm

Class A1

Class A2

Class A3

Class B1

Class B2

Class B3

Class C1

Class C2

Class C3

M ≤ 15

1,8

2,1

2,6

1,3

1,8

2,3

1,3

1,7

2,1

15 < M ≤ 50

2,0

2,4

3,0

1,5

2,1

2,7

1,5

1,9

2,4

50 < M ≤ 130

2,4

2,8

3,5

1,8

2,5

3,1

1,8

2,3

2,8

130 < M ≤ 300

2,6

3,2

3,9

2,2

2,8

3,5

2,2

2,5

3,2

300 < M

3,2

3,8

4,7

2,5

3,3

4,2

2,5

3,0

3,8

Please note: The total required thickness may be reduced for SAW pipes by a maximum of 10% on joint seam.
Class 1 and 2 for medium and light applications (sandy soil).
Class 3 – application in extreme conditions (rocky soil) or underwater.

Minimum thickness of finished coating

Pipe Sizes (Specified OD)

Minimum Coating Thickness Chart (mm)

≤ 10 3 /4” (273.1 mm)

2.5

> 12 3 /4” ( 323.9 mm) to ≤ 18” (457 mm)

2.8

> 20" (508.0 mm) to ≤ 30" (762 mm)

3.0

> 32" (813.0 mm)

3.3

 

Advantages of coated steel pipes
 

Coated steel pipe refers to the pipe that has undergone processing after corrosion, which can effectively prevent or slow down the corrosion of steel pipes to extend service life and reduce operating costs.

Strong anti-corrosion performance:

By coating the surface of the steel pipe with a layer of plastic film or coating, such as epoxy resin coating, the oxidation and corrosion of the steel pipe surface can be effectively prevented. 

Outstanding wear resistance

The plastic coating or epoxy resin coating of coated steel pipes has good wear resistance and can resist wear caused by external physical friction and chemical corrosion, reduce wear on the surface of the pipe, and protect the overall integrity of the steel pipe 

Low friction resistance

The coated steel pipe has a smooth coating surface and low friction resistance, which helps reduce the resistance of fluid flow in the pipeline and improves transportation efficiency. When transporting liquid or gas, it can reduce energy loss and reduce operating costs. 

Easy to install and maintain

The coating of coated steel pipes usually has better flexibility and adhesion, making the pipes more convenient to bend, connect and install.

 

3PE steel pipe anti-corrosion flow chart

productcate-640-346

 

 

 
Types of Coated Steel Pipe
 
Fusion-Bonded Epoxy (FBE) Coating Pipe

FBE coating is a thermosetting polymer that is applied to pipes using a process of electrostatic spray deposition. The coating is melted and bonded to the pipe surface using heat. FBE coating provides excellent corrosion protection, good abrasion resistance, and high impact strength. It is also resistant to high temperatures and can be used for both above-ground and buried pipelines.

 
Polyethylene (PE) Coating Pipe

PE coating is a thermoplastic polymer that is applied to pipes using a process of extrusion. The coating is melted and applied to the pipe surface using a heated die. PE coating provides excellent resistance to abrasion, impact, and chemical attack. It is also resistant to high temperatures and can be used for both above-ground and buried pipelines.

 
Polyurethane (PU) Coating Pipe

PU coating is a thermosetting polymer that is applied to pipes using a process of spray application. The coating is cured using heat or ambient temperature. PU coating provides excellent resistance to corrosion, abrasion, and impact. It is also resistant to high temperatures and can be used for both above-ground and buried pipelines.

 
Coal Tar Enamel (CTE) Coating Pipe

CTE coating is a thermosetting polymer that is applied to pipes using a process of brush or spray application. The coating is cured using heat. CTE coating provides excellent resistance to corrosion and abrasion. It is also resistant to high temperatures and can be used for both above-ground and buried pipelines.

 

 

Coated Steel Pipe

 

 
Applications of coated steel pipes

 

Petrochemical Industry: Coated steel pipes, especially epoxy-coated steel pipes, play an important role in the petrochemical industry. Since the media involved in the petrochemical industry are mostly corrosive substances such as strong acids and alkalis, ordinary steel pipes cannot meet the needs of use. With its excellent corrosion resistance, coated steel pipes can effectively protect the inside of the pipeline, prevent corrosion from corrosive substances, and ensure the safety and stability of petrochemical production.
Marine engineering: The marine environment has the characteristics of high salinity, high humidity, seawater erosion, etc., which puts forward higher requirements for the use of steel pipes. Coated steel pipes, especially those with excellent seawater corrosion resistance, can be used in harsh marine environments for a long time, providing reliable guarantee for the construction of marine projects.
Construction Engineering: In construction engineering, coated steel pipes are widely used in pipeline construction for water supply, drainage, HVAC and other systems. Its corrosion resistance and wear resistance make the pipeline system safer and more stable, extending the service life of the pipeline.
Fire protection system: Plastic-coated steel pipes also have important applications in fire protection systems. Due to its good high temperature resistance, it can effectively solve the corrosion, anti-corrosion and flame retardant problems of fire extinguishing agents in water and anhydrous conditions, thereby increasing the service life of fire water supply and automatic sprinkler pipeline systems.

3PE Coated Pipe
Petrochemical Industry
2PE /3PE coated pipe
Marine engineering
3PE Coating Anti-corrosive Steel Pipe
Construction Engineering
3PE/3PP External coating pipe
Fire protection system

How to maintain coated steel pipes?

 

Regular Cleaning: Regular cleaning is a critical step in the maintenance of coated steel pipes. It is recommended to use a soft damp cloth for cleaning and avoid using chemical solvents or corrosive detergents to avoid damage to the coating. Timely cleaning of dust or harmful substances accumulated on steel pipes can not only keep the appearance of steel pipes tidy, but also effectively prevent potential corrosion and damage.

 

Check coating integrity: Regularly check whether the coating is complete and whether there is any damage or aging. Once the coating is found to be damaged, it should be repaired or replaced in time to avoid exposure of the steel pipe base material, which will lead to accelerated corrosion.

 

Pay attention to operations during installation and maintenance: When installing and maintaining coated steel pipes, excessive bending, stretching, deformation or extrusion should be avoided to avoid damage to the coating and pipe wall. At the same time, ensure that the pipes are well connected and sealed to avoid water leakage and leakage.

 

Control temperature and pressure: When using coated steel pipes, attention should be paid to controlling the temperature and pressure of the pipe to avoid exceeding its endurance range to ensure the stability and safety of the pipe.

 

Properly set up supports and fixing devices: When installing coated steel pipes, set up reasonable supports and fixing devices to reduce the impact of external forces on the steel pipe and prevent pipe deformation or rupture.

 

Regular inspection and maintenance: Inspect coated steel pipes at regular intervals, mainly to check for corrosion, fatigue fracture, deformation, etc. Once problems are discovered, repair or replace them promptly.

Gnee Packaging and shipping

Package:
Packaging of coated composite pipes: For coated composite pipes with smaller diameters, they are usually packaged in hexagonal bundling, and before bundling, ensure that both ends of the pipe are covered with plastic caps to protect the coating from damage.
Packaging of large-diameter coated composite pipes: For coated composite pipes with a nominal outer diameter of not less than 300mm or 3000mm, they are not bundled, but are directly covered with a protective layer on the outer plastic coating to prevent damage during storage and transportation. be damaged.
Protection of special coating: If the coated composite pipe is welded with flanges, both ends should be covered with protective sleeves or protective layers to ensure the integrity of the coating.
Packaging identification: Each package should be accompanied by a product certificate and include key contents such as product name, specification, model, quantity, production date, mining product safety mark, inspection mark, manufacturer information, etc. for traceability and inspection.

Gnee Packaging and shipping

FAQ

Q: What is 3PE coating?

A: 3PE, which stands for "Three-Layer Polyethylene," is a common coating used to protect steel pipes from corrosion and extend their service life, especially in applications where the pipes are exposed to harsh environments, such as in the oil and gas industry.

Q: What is the difference between 3LPE and 3LPP?

A: 3LPE coating is composed of epoxy resin layer, adhesive layer and polyethylene layer. Whereas 3LPP coating uses polypropylene. Coating Thickness: The thickness of 3LPE coating is generally between 1.8mm and 4.0mm, while the thickness of 3LPP coating is between 1.0mm and 4.5mm.

Q: What is FBE coated pipe?

A:Fusion bond epoxy coating, also known as powder coating or FBE coating, is an epoxy-based powder coating widely used to protect steel pipe used in pipeline construction, piping connections and valves from corrosion.

Q:What is the standard for 3LPE coating?

A: The production of 3LPE Pipe is to conform to standard ISO 21809. This particular standard caters to the natural gas and petroleum industry, wherein the pipes are used for the conveyance of fluid or gas across refineries to sites.

Q: What is used for coating of pipes?

A: To offer safe drinking water, coating materials are designed for contact. Potable water testing for the number of tanks and chemicals that leach into the water. Coal tar enamel, cement mortar, liquid-applied epoxy, fusion-bonded epoxy (FBE), or polyurethane (PU) are examples of coatings.

Q: Why are pipelines coated?

A: Protective coatings can stop—or at least significantly impede—exterior pipeline corrosion. Another consideration is abrasion risk. Pipelines are most often built underground to stay out of sight and out of the way, but the tradeoff is that subsurface soil and sediment can gradually weaken pipelines.

Q:What is the difference between 3LPE and HDPE?

A: The high density polyethylene (HDPE) outer layer provides excellent mechanical protection for the FBE anti-corrosion layer. The 3LPE coating provides the most effective anti-corrosion protection by minimizing the amount of water that can reach the FBE layer.

Q: How do you guarantee the quality of your products?

A: Each product is produced by certified workshops and inspected piece by piece according to national QA/QC standards. We can also issue a warranty to our customers to guarantee the quality.

Q: Do you provide samples ? is it free or extra ?

A: The sample could can provide for customer with free,but the courier freight will be covered by customer account.

Q: How can I get a quotation from you?

A: You can leave us message, and we will reply every message in time. Or we may talk online by trade manager. And you can also find our contact information on contact page.

We're well-known as one of the leading 3pe steel pipe manufacturers and suppliers in China. If you're going to buy discount 3pe steel pipe in stock, welcome to get quotation and free sample from our factory. Also, customized service is available.